west:~# ipsec spi --clear
west:~# ipsec eroute --clear
west:~# enckey=0x4043434545464649494a4a4c4c4f4f515152525454575758
west:~# ipsec spi --af inet --edst 192.1.2.45 --spi 0x12345678 --proto esp --src 192.1.2.23 --esp 3des-md5-96 --enckey $enckey --authkey 0x87658765876587658765876587658765
west:~# ipsec spi --af inet --edst 192.1.2.45 --spi 0x12345678 --proto tun --src 192.1.2.23 --dst 192.1.2.45 --ip4
west:~# ipsec spigrp inet 192.1.2.45 0x12345678 tun inet 192.1.2.45 0x12345678 esp 
west:~# ipsec eroute --add --eraf inet --src 192.0.2.0/24 --dst 192.0.1.0/24 --said tun0x12345678@192.1.2.45
west:~# ipsec tncfg --attach --virtual ipsec0 --physical eth1
west:~# ifconfig ipsec0 inet 192.1.2.45 netmask 0xffffff00 broadcast 192.1.2.255 up
west:~# ipsec look
west NOW
192.0.2.0/24       -> 192.0.1.0/24       => tun0x12345678@192.1.2.45 esp0x12345678@192.1.2.45  (0)
ipsec0->eth1 mtu=16260(1500)->1500
esp0x12345678@192.1.2.45 ESP_3DES_HMAC_MD5: dir=in  src=192.1.2.23 iv_bits=64bits iv=0xDEADF00DDEADF00D alen=128 aklen=128 eklen=192 life(c,s,h)= natencap=none natsport=0 natdport=0 refcount=4 ref=3
tun0x12345678@192.1.2.45 IPIP: dir=in  src=192.1.2.23 life(c,s,h)= natencap=none natsport=0 natdport=0 refcount=4 ref=4
ROUTING TABLE
west:~# route add -host 192.0.2.1 gw 192.1.2.23 dev ipsec0

